Liquid dropout naturally occurs with reservoir depletion below the dewpoint,which differs from dry gas.It is unresolved to account for the effect of condensate on deliverability.

• 凝析油的析出是凝析气藏衰竭过程中普遍存在的现象，此现象是凝析气与干气最本质的区别，但如何考虑凝析油的影响仍然是一个未曾得到圆满解决的难题。